155256651 has 48 divisors (see below), whose sum is σ = 254412288. Its totient is φ = 90417600.

The previous prime is 155256643. The next prime is 155256667. The reversal of 155256651 is 156652551.

155256651 is a `hidden beast` number, since 1 + 552 + 56 + 6 + 51 = 666.

It is not a de Polignac number, because 155256651 - 2³ = 155256643 is a prime.

It is a super-4 number, since 4×155256651⁴ (a number of 34 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (155256641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 283560 + ... + 284106.

It is an arithmetic number, because the mean of its divisors is an integer number (5300256).

Almost surely, 2^155256651 is an apocalyptic number.

155256651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155256651 is a deficient number, since it is larger than the sum of its proper divisors (99155637).

155256651 is a wasteful number, since it uses less digits than its factorization.

155256651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 669 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 155256651 is about 12460.2026869550. The cubic root of 155256651 is about 537.4648555352.

The spelling of 155256651 in words is "one hundred fifty-five million, two hundred fifty-six thousand, six hundred fifty-one".