55361405 has 16 divisors (see below), whose sum is σ = 72715968. Its totient is φ = 40128000.

The previous prime is 55361399. The next prime is 55361407. The reversal of 55361405 is 50416355.

It is not a de Polignac number, because 55361405 - 2⁴ = 55361389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55361407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16685 + ... + 19725.

It is an arithmetic number, because the mean of its divisors is an integer number (4544748).

Almost surely, 2^55361405 is an apocalyptic number.

55361405 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55361405 is a deficient number, since it is larger than the sum of its proper divisors (17354563).

55361405 is a wasteful number, since it uses less digits than its factorization.

55361405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55361405 is about 7440.5245110812. The cubic root of 55361405 is about 381.1264015722.

The spelling of 55361405 in words is "fifty-five million, three hundred sixty-one thousand, four hundred five".