61426631 has 4 divisors (see below), whose sum is σ = 70201872. Its totient is φ = 52651392.

The previous prime is 61426613. The next prime is 61426637. The reversal of 61426631 is 13662416.

It is a happy number.

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 61426631 - 2⁶ = 61426567 is a prime.

It is a super-2 number, since 2×61426631² = 7546461992020322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61426594 and 61426603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61426637) 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, 4387610 + ... + 4387623.

It is an arithmetic number, because the mean of its divisors is an integer number (17550468).

Almost surely, 2^61426631 is an apocalyptic number.

61426631 is a deficient number, since it is larger than the sum of its proper divisors (8775241).

61426631 is an equidigital number, since it uses as much as digits as its factorization.

61426631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8775240.

The product of its digits is 5184, while the sum is 29.

The square root of 61426631 is about 7837.5143381049. The cubic root of 61426631 is about 394.5653093400.

The spelling of 61426631 in words is "sixty-one million, four hundred twenty-six thousand, six hundred thirty-one".