1255151511 has 16 divisors (see below), whose sum is σ = 1877541120. Its totient is φ = 828641880.

The previous prime is 1255151501. The next prime is 1255151537. The reversal of 1255151511 is 1151515521.

It is a happy number.

1255151511 is a `hidden beast` number, since 12 + 551 + 51 + 51 + 1 = 666.

It is not a de Polignac number, because 1255151511 - 2⁷ = 1255151383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255151501) 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, 222885 + ... + 228446.

It is an arithmetic number, because the mean of its divisors is an integer number (117346320).

Almost surely, 2^1255151511 is an apocalyptic number.

1255151511 is a deficient number, since it is larger than the sum of its proper divisors (622389609).

1255151511 is a wasteful number, since it uses less digits than its factorization.

1255151511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451443 (or 451437 counting only the distinct ones).

The product of its digits is 1250, while the sum is 27.

The square root of 1255151511 is about 35428.1175198457. The cubic root of 1255151511 is about 1078.6951293194.

The spelling of 1255151511 in words is "one billion, two hundred fifty-five million, one hundred fifty-one thousand, five hundred eleven".