61922431 has 4 divisors (see below), whose sum is σ = 62293392. Its totient is φ = 61551472.

The previous prime is 61922411. The next prime is 61922461. The reversal of 61922431 is 13422916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61922431 - 2⁷ = 61922303 is a prime.

It is a super-2 number, since 2×61922431² = 7668774921899522, which contains 22 as substring.

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 61922431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61922401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185230 + ... + 185563.

It is an arithmetic number, because the mean of its divisors is an integer number (15573348).

Almost surely, 2^61922431 is an apocalyptic number.

61922431 is a deficient number, since it is larger than the sum of its proper divisors (370961).

61922431 is a wasteful number, since it uses less digits than its factorization.

61922431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370960.

The product of its digits is 2592, while the sum is 28.

The square root of 61922431 is about 7869.0806959898. The cubic root of 61922431 is about 395.6240331089.

The spelling of 61922431 in words is "sixty-one million, nine hundred twenty-two thousand, four hundred thirty-one".