651221252534 has 32 divisors (see below), whose sum is σ = 1039155324480. Its totient is φ = 305017326592.

The previous prime is 651221252531. The next prime is 651221252537. The reversal of 651221252534 is 435252122156.

It is an interprime number because it is at equal distance from previous prime (651221252531) and next prime (651221252537).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651221252531) 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, 21080852 + ... + 21111720.

It is an arithmetic number, because the mean of its divisors is an integer number (32473603890).

Almost surely, 2^651221252534 is an apocalyptic number.

651221252534 is a deficient number, since it is larger than the sum of its proper divisors (387934071946).

651221252534 is a wasteful number, since it uses less digits than its factorization.

651221252534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33784.

The product of its digits is 144000, while the sum is 38.

The spelling of 651221252534 in words is "six hundred fifty-one billion, two hundred twenty-one million, two hundred fifty-two thousand, five hundred thirty-four".