201551070015 has 160 divisors (see below), whose sum is σ = 391804148736. Its totient is φ = 98752711680.

The previous prime is 201551070011. The next prime is 201551070047. The reversal of 201551070015 is 510070155102.

It is not a de Polignac number, because 201551070015 - 2² = 201551070011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201551070011) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 50348004 + ... + 50352006.

Almost surely, 2^201551070015 is an apocalyptic number.

201551070015 is a deficient number, since it is larger than the sum of its proper divisors (190253078721).

201551070015 is a wasteful number, since it uses less digits than its factorization.

201551070015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211 (or 4202 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The spelling of 201551070015 in words is "two hundred one billion, five hundred fifty-one million, seventy thousand, fifteen".