651551151 has 4 divisors (see below), whose sum is σ = 868734872. Its totient is φ = 434367432.

The previous prime is 651551137. The next prime is 651551221. The reversal of 651551151 is 151155156.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 651551151 - 2⁷ = 651551023 is a prime.

It is the 25526-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651551851) by changing a digit.

It is a nontrivial repunit in base 25525.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108591856 + ... + 108591861.

It is an arithmetic number, because the mean of its divisors is an integer number (217183718).

Almost surely, 2^651551151 is an apocalyptic number.

651551151 is a deficient number, since it is larger than the sum of its proper divisors (217183721).

651551151 is a wasteful number, since it uses less digits than its factorization.

651551151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217183720.

The product of its digits is 3750, while the sum is 30.

The square root of 651551151 is about 25525.5000146912. The cubic root of 651551151 is about 866.9276182807.

The spelling of 651551151 in words is "six hundred fifty-one million, five hundred fifty-one thousand, one hundred fifty-one".