97251021 has 24 divisors (see below), whose sum is σ = 161004480. Its totient is φ = 55411776.

The previous prime is 97251013. The next prime is 97251023. The reversal of 97251021 is 12015279.

It is not a de Polignac number, because 97251021 - 2³ = 97251013 is a prime.

It is a super-2 number, since 2×97251021² = 18915522171084882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97251023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21841 + ... + 25913.

It is an arithmetic number, because the mean of its divisors is an integer number (6708520).

Almost surely, 2^97251021 is an apocalyptic number.

It is an amenable number.

97251021 is a deficient number, since it is larger than the sum of its proper divisors (63753459).

97251021 is a wasteful number, since it uses less digits than its factorization.

97251021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465 (or 4462 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 97251021 is about 9861.5932282771. The cubic root of 97251021 is about 459.8660936638.

The spelling of 97251021 in words is "ninety-seven million, two hundred fifty-one thousand, twenty-one".