1610552421 has 12 divisors (see below), whose sum is σ = 2338164972. Its totient is φ = 1068250176.

The previous prime is 1610552413. The next prime is 1610552453. The reversal of 1610552421 is 1242550161.

1610552421 is a `hidden beast` number, since 1 + 610 + 5 + 5 + 2 + 42 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1481480100 + 129072321 = 38490^2 + 11361^2 .

It is not a de Polignac number, because 1610552421 - 2³ = 1610552413 is a prime.

It is a super-2 number, since 2×1610552421² = 5187758201577922482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610552221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 452416 + ... + 455961.

It is an arithmetic number, because the mean of its divisors is an integer number (194847081).

Almost surely, 2^1610552421 is an apocalyptic number.

It is an amenable number.

1610552421 is a deficient number, since it is larger than the sum of its proper divisors (727612551).

1610552421 is a wasteful number, since it uses less digits than its factorization.

1610552421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908580 (or 908577 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1610552421 is about 40131.6884892724. The cubic root of 1610552421 is about 1172.1727519797.

The spelling of 1610552421 in words is "one billion, six hundred ten million, five hundred fifty-two thousand, four hundred twenty-one".