53533431 has 36 divisors (see below), whose sum is σ = 94699800. Its totient is φ = 28975968.

The previous prime is 53533429. The next prime is 53533433. The reversal of 53533431 is 13433535.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53533429) and next prime (53533433).

It is not a de Polignac number, because 53533431 - 2¹ = 53533429 is a prime.

It is a super-2 number, since 2×53533431² = 5731656469263522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 53533395 and 53533404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53533433) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5185 + ... + 11573.

It is an arithmetic number, because the mean of its divisors is an integer number (2630550).

Almost surely, 2^53533431 is an apocalyptic number.

53533431 is a deficient number, since it is larger than the sum of its proper divisors (41166369).

53533431 is a wasteful number, since it uses less digits than its factorization.

53533431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6428 (or 6418 counting only the distinct ones).

The product of its digits is 8100, while the sum is 27.

The square root of 53533431 is about 7316.6543583799. The cubic root of 53533431 is about 376.8845718384.

Adding to 53533431 its reverse (13433535), we get a palindrome (66966966).

The spelling of 53533431 in words is "fifty-three million, five hundred thirty-three thousand, four hundred thirty-one".