52903981 has 8 divisors (see below), whose sum is σ = 58363704. Its totient is φ = 47642880.

The previous prime is 52903973. The next prime is 52904021. The reversal of 52903981 is 18930925.

It can be written as a sum of positive squares in 4 ways, for example, as 2975625 + 49928356 = 1725^2 + 7066^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52903981 - 2³ = 52903973 is a prime.

It is a super-2 number, since 2×52903981² = 5597662411296722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52903981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52904981) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 49096 + ... + 50161.

It is an arithmetic number, because the mean of its divisors is an integer number (7295463).

Almost surely, 2^52903981 is an apocalyptic number.

It is an amenable number.

52903981 is a deficient number, since it is larger than the sum of its proper divisors (5459723).

52903981 is a wasteful number, since it uses less digits than its factorization.

52903981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99311.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 52903981 is about 7273.5122877465. The cubic root of 52903981 is about 375.4015987993.

The spelling of 52903981 in words is "fifty-two million, nine hundred three thousand, nine hundred eighty-one".