202151961 has 48 divisors (see below), whose sum is σ = 331468800. Its totient is φ = 117612000.

The previous prime is 202151959. The next prime is 202151969. The reversal of 202151961 is 169151202.

It is not a de Polignac number, because 202151961 - 2¹ = 202151959 is a prime.

It is a super-2 number, since 2×202151961² = 81730830672291042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202151969) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 610566 + ... + 610896.

It is an arithmetic number, because the mean of its divisors is an integer number (6905600).

Almost surely, 2^202151961 is an apocalyptic number.

It is an amenable number.

202151961 is a deficient number, since it is larger than the sum of its proper divisors (129316839).

202151961 is a wasteful number, since it uses less digits than its factorization.

202151961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 575 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 202151961 is about 14218.0153678353. The cubic root of 202151961 is about 586.8935269255.

The spelling of 202151961 in words is "two hundred two million, one hundred fifty-one thousand, nine hundred sixty-one".