55403712 has 252 divisors, whose sum is σ = 200259696. Its totient is φ = 14515200.

The previous prime is 55403701. The next prime is 55403723. The reversal of 55403712 is 21730455.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55403701) and next prime (55403723).

It is a tau number, because it is divible by the number of its divisors (252).

It is a super-3 number, since 3×55403712³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 366837 + ... + 366987.

Almost surely, 2^55403712 is an apocalyptic number.

55403712 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55403712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100129848).

55403712 is an abundant number, since it is smaller than the sum of its proper divisors (144855984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55403712 is a wasteful number, since it uses less digits than its factorization.

55403712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 55403712 is about 7443.3669800702. The cubic root of 55403712 is about 381.2234620245.

The spelling of 55403712 in words is "fifty-five million, four hundred three thousand, seven hundred twelve".