21400151725 has 24 divisors (see below), whose sum is σ = 28833908480. Its totient is φ = 15695856000.

The previous prime is 21400151711. The next prime is 21400151741. The reversal of 21400151725 is 52715100412.

It is not a de Polignac number, because 21400151725 - 2³¹ = 19252668077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21400151693 and 21400151702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 711936 + ... + 741385.

Almost surely, 2^21400151725 is an apocalyptic number.

21400151725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21400151725 is a deficient number, since it is larger than the sum of its proper divisors (7433756755).

21400151725 is a wasteful number, since it uses less digits than its factorization.

21400151725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453381 (or 1453376 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The spelling of 21400151725 in words is "twenty-one billion, four hundred million, one hundred fifty-one thousand, seven hundred twenty-five".