251155130 has 16 divisors (see below), whose sum is σ = 453388320. Its totient is φ = 100171152.

The previous prime is 251155123. The next prime is 251155133. The reversal of 251155130 is 31551152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 251155096 and 251155105.

It is not an unprimeable number, because it can be changed into a prime (251155133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32720 + ... + 39659.

It is an arithmetic number, because the mean of its divisors is an integer number (28336770).

Almost surely, 2^251155130 is an apocalyptic number.

251155130 is a deficient number, since it is larger than the sum of its proper divisors (202233190).

251155130 is a wasteful number, since it uses less digits than its factorization.

251155130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72733.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 251155130 is about 15847.8746209074. The cubic root of 251155130 is about 630.9292828225.

The spelling of 251155130 in words is "two hundred fifty-one million, one hundred fifty-five thousand, one hundred thirty".