1523631493 has 16 divisors (see below), whose sum is σ = 1629734400. Its totient is φ = 1421259840.

The previous prime is 1523631479. The next prime is 1523631553. The reversal of 1523631493 is 3941363251.

It is not a de Polignac number, because 1523631493 - 2¹⁷ = 1523500421 is a prime.

It is a super-2 number, since 2×1523631493² = 4642905852922818098, which 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 (1523631433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771255 + ... + 773227.

It is an arithmetic number, because the mean of its divisors is an integer number (101858400).

Almost surely, 2^1523631493 is an apocalyptic number.

It is an amenable number.

1523631493 is a deficient number, since it is larger than the sum of its proper divisors (106102907).

1523631493 is a wasteful number, since it uses less digits than its factorization.

1523631493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892.

The product of its digits is 58320, while the sum is 37.

The square root of 1523631493 is about 39033.7225101578. The cubic root of 1523631493 is about 1150.6943489224.

The spelling of 1523631493 in words is "one billion, five hundred twenty-three million, six hundred thirty-one thousand, four hundred ninety-three".