51157739 has 2 divisors, whose sum is σ = 51157740. Its totient is φ = 51157738.

The previous prime is 51157697. The next prime is 51157751. The reversal of 51157739 is 93775115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51157739 - 2¹⁶ = 51092203 is a prime.

It is a super-2 number, since 2×51157739² = 5234228519184242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51157789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25578869 + 25578870.

It is an arithmetic number, because the mean of its divisors is an integer number (25578870).

Almost surely, 2^51157739 is an apocalyptic number.

51157739 is a deficient number, since it is larger than the sum of its proper divisors (1).

51157739 is an equidigital number, since it uses as much as digits as its factorization.

51157739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33075, while the sum is 38.

The square root of 51157739 is about 7152.4638412228. The cubic root of 51157739 is about 371.2249128449.

The spelling of 51157739 in words is "fifty-one million, one hundred fifty-seven thousand, seven hundred thirty-nine".