1520431332 has 96 divisors (see below), whose sum is σ = 4213063680. Its totient is φ = 417605760.

The previous prime is 1520431327. The next prime is 1520431333. The reversal of 1520431332 is 2331340251.

It is a super-2 number, since 2×1520431332² = 4623422870654588448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1520431333) 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, 406969 + ... + 410687.

It is an arithmetic number, because the mean of its divisors is an integer number (43886080).

Almost surely, 2^1520431332 is an apocalyptic number.

1520431332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1520431332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106531840).

1520431332 is an abundant number, since it is smaller than the sum of its proper divisors (2692632348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1520431332 is a wasteful number, since it uses less digits than its factorization.

1520431332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921 (or 3919 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1520431332 is about 38992.7087030383. The cubic root of 1520431332 is about 1149.8881635415. Note that the first 3 decimals are identical.

Adding to 1520431332 its reverse (2331340251), we get a palindrome (3851771583).

The spelling of 1520431332 in words is "one billion, five hundred twenty million, four hundred thirty-one thousand, three hundred thirty-two".