53777431 has 2 divisors, whose sum is σ = 53777432. Its totient is φ = 53777430.

The previous prime is 53777419. The next prime is 53777461. The reversal of 53777431 is 13477735.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53777431 is a prime.

It is a super-2 number, since 2×53777431² = 5784024169919522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53777461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26888715 + 26888716.

It is an arithmetic number, because the mean of its divisors is an integer number (26888716).

Almost surely, 2^53777431 is an apocalyptic number.

53777431 is a deficient number, since it is larger than the sum of its proper divisors (1).

53777431 is an equidigital number, since it uses as much as digits as its factorization.

53777431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61740, while the sum is 37.

The square root of 53777431 is about 7333.3096893558. The cubic root of 53777431 is about 377.4563047535.

The spelling of 53777431 in words is "fifty-three million, seven hundred seventy-seven thousand, four hundred thirty-one".