42313551 has 32 divisors (see below), whose sum is σ = 68375040. Its totient is φ = 22737024.

The previous prime is 42313547. The next prime is 42313571. The reversal of 42313551 is 15531324.

It is not a de Polignac number, because 42313551 - 2² = 42313547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42313511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68721 + ... + 69333.

It is an arithmetic number, because the mean of its divisors is an integer number (2136720).

Almost surely, 2^42313551 is an apocalyptic number.

42313551 is a deficient number, since it is larger than the sum of its proper divisors (26061489).

42313551 is a wasteful number, since it uses less digits than its factorization.

42313551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its digits is 1800, while the sum is 24.

The square root of 42313551 is about 6504.8867015498. The cubic root of 42313551 is about 348.4655300274.

Adding to 42313551 its reverse (15531324), we get a palindrome (57844875).

The spelling of 42313551 in words is "forty-two million, three hundred thirteen thousand, five hundred fifty-one".