51537797 has 2 divisors, whose sum is σ = 51537798. Its totient is φ = 51537796.

The previous prime is 51537769. The next prime is 51537809. The reversal of 51537797 is 79773515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47969476 + 3568321 = 6926^2 + 1889^2 .

It is a cyclic number.

It is not a de Polignac number, because 51537797 - 2¹⁰ = 51536773 is a prime.

It is a super-2 number, since 2×51537797² = 5312289039226418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51537737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25768898 + 25768899.

It is an arithmetic number, because the mean of its divisors is an integer number (25768899).

Almost surely, 2^51537797 is an apocalyptic number.

It is an amenable number.

51537797 is a deficient number, since it is larger than the sum of its proper divisors (1).

51537797 is an equidigital number, since it uses as much as digits as its factorization.

51537797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 231525, while the sum is 44.

The square root of 51537797 is about 7178.9830059696. The cubic root of 51537797 is about 372.1419396107.

The spelling of 51537797 in words is "fifty-one million, five hundred thirty-seven thousand, seven hundred ninety-seven".