61524431 has 2 divisors, whose sum is σ = 61524432. Its totient is φ = 61524430.

The previous prime is 61524401. The next prime is 61524461. The reversal of 61524431 is 13442516.

It is a balanced prime because it is at equal distance from previous prime (61524401) and next prime (61524461).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61524431 is a prime.

It is a super-2 number, since 2×61524431² = 7570511219747522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61524431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61524401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30762215 + 30762216.

It is an arithmetic number, because the mean of its divisors is an integer number (30762216).

Almost surely, 2^61524431 is an apocalyptic number.

61524431 is a deficient number, since it is larger than the sum of its proper divisors (1).

61524431 is an equidigital number, since it uses as much as digits as its factorization.

61524431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 61524431 is about 7843.7510796812. The cubic root of 61524431 is about 394.7745998125.

Adding to 61524431 its reverse (13442516), we get a palindrome (74966947).

The spelling of 61524431 in words is "sixty-one million, five hundred twenty-four thousand, four hundred thirty-one".