1551125431 has 2 divisors, whose sum is σ = 1551125432. Its totient is φ = 1551125430.

The previous prime is 1551125417. The next prime is 1551125447. The reversal of 1551125431 is 1345211551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1551125431 - 2⁹ = 1551124919 is a prime.

It is a super-2 number, since 2×1551125431² = 4811980205389871522, 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 1551125431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551125461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775562715 + 775562716.

It is an arithmetic number, because the mean of its divisors is an integer number (775562716).

Almost surely, 2^1551125431 is an apocalyptic number.

1551125431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551125431 is an equidigital number, since it uses as much as digits as its factorization.

1551125431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 28.

The square root of 1551125431 is about 39384.3297645142. The cubic root of 1551125431 is about 1157.5745573776.

Adding to 1551125431 its reverse (1345211551), we get a palindrome (2896336982).

The spelling of 1551125431 in words is "one billion, five hundred fifty-one million, one hundred twenty-five thousand, four hundred thirty-one".