97521111 has 8 divisors (see below), whose sum is σ = 144475760. Its totient is φ = 65014056.

The previous prime is 97521103. The next prime is 97521131. The reversal of 97521111 is 11112579.

It is not a de Polignac number, because 97521111 - 2³ = 97521103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3611893 = 97521111 / (9 + 7 + 5 + 2 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97521131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805920 + ... + 1805973.

It is an arithmetic number, because the mean of its divisors is an integer number (18059470).

Almost surely, 2^97521111 is an apocalyptic number.

97521111 is a deficient number, since it is larger than the sum of its proper divisors (46954649).

97521111 is a wasteful number, since it uses less digits than its factorization.

97521111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611902 (or 3611896 counting only the distinct ones).

The product of its digits is 630, while the sum is 27.

The square root of 97521111 is about 9875.2777682453. The cubic root of 97521111 is about 460.2914205694.

The spelling of 97521111 in words is "ninety-seven million, five hundred twenty-one thousand, one hundred eleven".