72210120624551 has 32 divisors (see below), whose sum is σ = 92744960394240. Its totient is φ = 54645172775424.

The previous prime is 72210120624539. The next prime is 72210120624557. The reversal of 72210120624551 is 15542602101227.

It is not a de Polignac number, because 72210120624551 - 2²² = 72210116430247 is a prime.

It is a super-2 number, since 2×72210120624551² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72210120624557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27093620 + ... + 29639238.

It is an arithmetic number, because the mean of its divisors is an integer number (2898280012320).

Almost surely, 2^{72210120624551} is an apocalyptic number.

72210120624551 is a deficient number, since it is larger than the sum of its proper divisors (20534839769689).

72210120624551 is a wasteful number, since it uses less digits than its factorization.

72210120624551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559215.

The product of its (nonzero) digits is 67200, while the sum is 38.

Adding to 72210120624551 its reverse (15542602101227), we get a palindrome (87752722725778).

The spelling of 72210120624551 in words is "seventy-two trillion, two hundred ten billion, one hundred twenty million, six hundred twenty-four thousand, five hundred fifty-one".