1225694151 has 24 divisors (see below), whose sum is σ = 1993704960. Its totient is φ = 718880400.

The previous prime is 1225694149. The next prime is 1225694189. The reversal of 1225694151 is 1514965221.

1225694151 is a `hidden beast` number, since 1 + 2 + 2 + 569 + 41 + 51 = 666.

1225694151 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1225694151 - 2¹ = 1225694149 is a prime.

It is a super-2 number, since 2×1225694151² = 3004652303591221602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225694111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196621 + ... + 202758.

It is an arithmetic number, because the mean of its divisors is an integer number (83071040).

Almost surely, 2^1225694151 is an apocalyptic number.

1225694151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1225694151 is a deficient number, since it is larger than the sum of its proper divisors (768010809).

1225694151 is a wasteful number, since it uses less digits than its factorization.

1225694151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399427 (or 399424 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1225694151 is about 35009.9150384573. The cubic root of 1225694151 is about 1070.1895465877.

The spelling of 1225694151 in words is "one billion, two hundred twenty-five million, six hundred ninety-four thousand, one hundred fifty-one".