1521472631 has 4 divisors (see below), whose sum is σ = 1738825872. Its totient is φ = 1304119392.

The previous prime is 1521472607. The next prime is 1521472651. The reversal of 1521472631 is 1362741251.

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 1521472631 - 2¹⁸ = 1521210487 is a prime.

It is a super-2 number, since 2×1521472631² = 4629757933764124322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521472651) 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, 108676610 + ... + 108676623.

It is an arithmetic number, because the mean of its divisors is an integer number (434706468).

Almost surely, 2^1521472631 is an apocalyptic number.

1521472631 is a deficient number, since it is larger than the sum of its proper divisors (217353241).

1521472631 is an equidigital number, since it uses as much as digits as its factorization.

1521472631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217353240.

The product of its digits is 10080, while the sum is 32.

The square root of 1521472631 is about 39006.0589011502. The cubic root of 1521472631 is about 1150.1506119060.

The spelling of 1521472631 in words is "one billion, five hundred twenty-one million, four hundred seventy-two thousand, six hundred thirty-one".