42501431501 has 4 divisors (see below), whose sum is σ = 42510034752. Its totient is φ = 42492828252.

The previous prime is 42501431449. The next prime is 42501431509. The reversal of 42501431501 is 10513410524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42501431501 is a prime.

It is a super-2 number, since 2×42501431501² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42501431509) 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, 4294211 + ... + 4304096.

It is an arithmetic number, because the mean of its divisors is an integer number (10627508688).

Almost surely, 2^42501431501 is an apocalyptic number.

It is an amenable number.

42501431501 is a deficient number, since it is larger than the sum of its proper divisors (8603251).

42501431501 is an equidigital number, since it uses as much as digits as its factorization.

42501431501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8603250.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 42501431501 in words is "forty-two billion, five hundred one million, four hundred thirty-one thousand, five hundred one".