1521012051 has 24 divisors (see below), whose sum is σ = 2387745360. Its totient is φ = 927412416.

The previous prime is 1521012041. The next prime is 1521012067. The reversal of 1521012051 is 1502101251.

It is not a de Polignac number, because 1521012051 - 2⁵ = 1521012019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1521012001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46881 + ... + 72386.

It is an arithmetic number, because the mean of its divisors is an integer number (99489390).

Almost surely, 2^1521012051 is an apocalyptic number.

1521012051 is a deficient number, since it is larger than the sum of its proper divisors (866733309).

1521012051 is a wasteful number, since it uses less digits than its factorization.

1521012051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119395 (or 119392 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1521012051 is about 39000.1544996940. The cubic root of 1521012051 is about 1150.0345423777.

It can be divided in two parts, 15210 and 12051, that added together give a triangular number (27261 = T₂₃₃).

The spelling of 1521012051 in words is "one billion, five hundred twenty-one million, twelve thousand, fifty-one".