42992551 has 6 divisors (see below), whose sum is σ = 50011800. Its totient is φ = 36850716.

The previous prime is 42992539. The next prime is 42992563. The reversal of 42992551 is 15529924.

It is an interprime number because it is at equal distance from previous prime (42992539) and next prime (42992563).

It is not a de Polignac number, because 42992551 - 2⁵ = 42992519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42992551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42992581) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 438651 + ... + 438748.

It is an arithmetic number, because the mean of its divisors is an integer number (8335300).

Almost surely, 2^42992551 is an apocalyptic number.

42992551 is a deficient number, since it is larger than the sum of its proper divisors (7019249).

42992551 is an equidigital number, since it uses as much as digits as its factorization.

42992551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877413 (or 877406 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 42992551 is about 6556.8705187765. The cubic root of 42992551 is about 350.3195747835.

The spelling of 42992551 in words is "forty-two million, nine hundred ninety-two thousand, five hundred fifty-one".