61331590 has 8 divisors (see below), whose sum is σ = 110396880. Its totient is φ = 24532632.

The previous prime is 61331587. The next prime is 61331623. The reversal of 61331590 is 9513316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3066570 + ... + 3066589.

It is an arithmetic number, because the mean of its divisors is an integer number (13799610).

Almost surely, 2^61331590 is an apocalyptic number.

61331590 is a deficient number, since it is larger than the sum of its proper divisors (49065290).

61331590 is a wasteful number, since it uses less digits than its factorization.

61331590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133166.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 61331590 is about 7831.4487803982. The cubic root of 61331590 is about 394.3617101416.

The spelling of 61331590 in words is "sixty-one million, three hundred thirty-one thousand, five hundred ninety".