97421556 has 48 divisors (see below), whose sum is σ = 237061440. Its totient is φ = 31100160.

The previous prime is 97421539. The next prime is 97421557. The reversal of 97421556 is 65512479.

It is a super-2 number, since 2×97421556² = 18981919146922272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97421557) 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, 44520 + ... + 46656.

It is an arithmetic number, because the mean of its divisors is an integer number (4938780).

Almost surely, 2^97421556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97421556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118530720).

97421556 is an abundant number, since it is smaller than the sum of its proper divisors (139639884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97421556 is a wasteful number, since it uses less digits than its factorization.

97421556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304 (or 2302 counting only the distinct ones).

The product of its digits is 75600, while the sum is 39.

The square root of 97421556 is about 9870.2358634432. The cubic root of 97421556 is about 460.1347368384.

The spelling of 97421556 in words is "ninety-seven million, four hundred twenty-one thousand, five hundred fifty-six".