52021556 has 12 divisors (see below), whose sum is σ = 93498468. Its totient is φ = 25307712.

The previous prime is 52021553. The next prime is 52021559. The reversal of 52021556 is 65512025.

It is an interprime number because it is at equal distance from previous prime (52021553) and next prime (52021559).

It can be written as a sum of positive squares in 2 ways, for example, as 30250000 + 21771556 = 5500^2 + 4666^2 .

It is a super-2 number, since 2×52021556² = 5412484577322272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52021553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175601 + ... + 175896.

It is an arithmetic number, because the mean of its divisors is an integer number (7791539).

Almost surely, 2^52021556 is an apocalyptic number.

It is an amenable number.

52021556 is a deficient number, since it is larger than the sum of its proper divisors (41476912).

52021556 is a wasteful number, since it uses less digits than its factorization.

52021556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351538 (or 351536 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 52021556 is about 7212.5970357424. The cubic root of 52021556 is about 373.3026842044.

The spelling of 52021556 in words is "fifty-two million, twenty-one thousand, five hundred fifty-six".