15420420134251 has 32 divisors (see below), whose sum is σ = 17452883220480. Its totient is φ = 13495921824000.

The previous prime is 15420420134237. The next prime is 15420420134293. The reversal of 15420420134251 is 15243102402451.

It is not a de Polignac number, because 15420420134251 - 2¹¹ = 15420420132203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15420420134221) 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, 154849926 + ... + 154949476.

It is an arithmetic number, because the mean of its divisors is an integer number (545402600640).

Almost surely, 2^{15420420134251} is an apocalyptic number.

15420420134251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15420420134251 is a deficient number, since it is larger than the sum of its proper divisors (2032463086229).

15420420134251 is a wasteful number, since it uses less digits than its factorization.

15420420134251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100995.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 15420420134251 in words is "fifteen trillion, four hundred twenty billion, four hundred twenty million, one hundred thirty-four thousand, two hundred fifty-one".