1231455051 has 24 divisors (see below), whose sum is σ = 1804046400. Its totient is φ = 809387136.

The previous prime is 1231455047. The next prime is 1231455073. The reversal of 1231455051 is 1505541321.

1231455051 is a `hidden beast` number, since 12 + 3 + 145 + 505 + 1 = 666.

It is not a de Polignac number, because 1231455051 - 2² = 1231455047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231455011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180366 + ... + 187068.

It is an arithmetic number, because the mean of its divisors is an integer number (75168600).

Almost surely, 2^1231455051 is an apocalyptic number.

1231455051 is a deficient number, since it is larger than the sum of its proper divisors (572591349).

1231455051 is a wasteful number, since it uses less digits than its factorization.

1231455051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6995 (or 6992 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1231455051 is about 35092.0938531744. The cubic root of 1231455051 is about 1071.8635968845.

Adding to 1231455051 its reverse (1505541321), we get a palindrome (2736996372).

The spelling of 1231455051 in words is "one billion, two hundred thirty-one million, four hundred fifty-five thousand, fifty-one".