1251423210513 has 32 divisors (see below), whose sum is σ = 1911161640960. Its totient is φ = 713512880640.

The previous prime is 1251423210503. The next prime is 1251423210547. The reversal of 1251423210513 is 3150123241521.

It is a happy number.

It is not a de Polignac number, because 1251423210513 - 2⁶ = 1251423210449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251423210503) 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, 108558756 + ... + 108570282.

It is an arithmetic number, because the mean of its divisors is an integer number (59723801280).

Almost surely, 2^{1251423210513} is an apocalyptic number.

It is an amenable number.

1251423210513 is a deficient number, since it is larger than the sum of its proper divisors (659738430447).

1251423210513 is a wasteful number, since it uses less digits than its factorization.

1251423210513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22557.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 1251423210513 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-three million, two hundred ten thousand, five hundred thirteen".