90942551 has 16 divisors (see below), whose sum is σ = 107993088. Its totient is φ = 74961600.

The previous prime is 90942547. The next prime is 90942563. The reversal of 90942551 is 15524909.

90942551 = 2071² + 2072² + ... + 2091².

It is not a de Polignac number, because 90942551 - 2² = 90942547 is a prime.

It is a super-3 number, since 3×90942551³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90947551) 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, 18146 + ... + 22608.

It is an arithmetic number, because the mean of its divisors is an integer number (6749568).

Almost surely, 2^90942551 is an apocalyptic number.

90942551 is a deficient number, since it is larger than the sum of its proper divisors (17050537).

90942551 is a wasteful number, since it uses less digits than its factorization.

90942551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4582.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 90942551 is about 9536.3803930003. The cubic root of 90942551 is about 449.6994717677.

The spelling of 90942551 in words is "ninety million, nine hundred forty-two thousand, five hundred fifty-one".