651151051 has 4 divisors (see below), whose sum is σ = 689454072. Its totient is φ = 612848032.

The previous prime is 651151043. The next prime is 651151069. The reversal of 651151051 is 150151156.

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

It is a cyclic number.

It is not a de Polignac number, because 651151051 - 2³ = 651151043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651151031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19151485 + ... + 19151518.

It is an arithmetic number, because the mean of its divisors is an integer number (172363518).

Almost surely, 2^651151051 is an apocalyptic number.

651151051 is a deficient number, since it is larger than the sum of its proper divisors (38303021).

651151051 is a wasteful number, since it uses less digits than its factorization.

651151051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38303020.

The product of its (nonzero) digits is 750, while the sum is 25.

The square root of 651151051 is about 25517.6615503851. The cubic root of 651151051 is about 866.7501296510.

It can be divided in two parts, 65115 and 1051, that added together give a palindrome (66166).

The spelling of 651151051 in words is "six hundred fifty-one million, one hundred fifty-one thousand, fifty-one".