2551231129 has 2 divisors, whose sum is σ = 2551231130. Its totient is φ = 2551231128.

The previous prime is 2551231117. The next prime is 2551231147. The reversal of 2551231129 is 9211321552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2472376729 + 78854400 = 49723^2 + 8880^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551231129 - 2¹³ = 2551222937 is a prime.

It is a super-2 number, since 2×2551231129² = 13017560547157229282, 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 2551231129.

It is not a weakly prime, because it can be changed into another prime (2551231169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275615564 + 1275615565.

It is an arithmetic number, because the mean of its divisors is an integer number (1275615565).

Almost surely, 2^2551231129 is an apocalyptic number.

It is an amenable number.

2551231129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551231129 is an equidigital number, since it uses as much as digits as its factorization.

2551231129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 31.

The square root of 2551231129 is about 50509.7132143908. The cubic root of 2551231129 is about 1366.4170373797.

The spelling of 2551231129 in words is "two billion, five hundred fifty-one million, two hundred thirty-one thousand, one hundred twenty-nine".