1255831251 has 16 divisors (see below), whose sum is σ = 1696149504. Its totient is φ = 826385504.

The previous prime is 1255831249. The next prime is 1255831253. The reversal of 1255831251 is 1521385521.

It is an interprime number because it is at equal distance from previous prime (1255831249) and next prime (1255831253).

It is a cyclic number.

It is not a de Polignac number, because 1255831251 - 2¹ = 1255831249 is a prime.

It is a super-2 number, since 2×1255831251² = 3154224261976450002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1255831253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466030 + ... + 468716.

It is an arithmetic number, because the mean of its divisors is an integer number (106009344).

Almost surely, 2^1255831251 is an apocalyptic number.

1255831251 is a deficient number, since it is larger than the sum of its proper divisors (440318253).

1255831251 is a wasteful number, since it uses less digits than its factorization.

1255831251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650.

The product of its digits is 12000, while the sum is 33.

The square root of 1255831251 is about 35437.7094491165. The cubic root of 1255831251 is about 1078.8898202650.

The spelling of 1255831251 in words is "one billion, two hundred fifty-five million, eight hundred thirty-one thousand, two hundred fifty-one".